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@ARTICLE{Hanauske:208887,
author = {Hanauske, Matthias and Takami, Kentaro and Bovard, Luke and
Rezzolla, Luciano and Font, José A. and Galeazzi, Filippo
and Stöcker, Horst},
title = {{R}otational properties of hypermassive neutron stars from
binary mergers},
journal = {Physical review / D},
volume = {96},
number = {4},
issn = {2470-0010},
address = {Woodbury, NY},
publisher = {Inst.},
reportid = {GSI-2018-00269, arXiv:1611.07152},
pages = {043004},
year = {2017},
note = {*Brief entry*25 pages, 20 figures},
abstract = {Determining the differential-rotation law of compact
stellar objects produced in binary neutron stars mergers or
core-collapse supernovae is an old problem in relativistic
astrophysics. Addressing this problem is important because
it impacts directly on the maximum mass these objects can
attain and, hence, on the threshold to black-hole formation
under realistic conditions. Using the results from a large
number of numerical simulations in full general relativity
of binary neutron star mergers described with various
equations of state and masses, we study the rotational
properties of the resulting hypermassive neutron stars. We
find that the angular-velocity distribution shows only a
modest dependence on the equation of state, thus exhibiting
the traits of “quasiuniversality” found in other aspects
of compact stars, both isolated and in binary systems. The
distributions are characterized by an almost uniformly
rotating core and a “disk.” Such a configuration is
significantly different from the j-constant
differential-rotation law that is commonly adopted in
equilibrium models of differentially rotating stars.
Furthermore, the rest-mass contained in such a disk can be
quite large, ranging from ≃0.03 M⊙ in the case of
high-mass binaries with stiff equations of state, up to
≃0.2 M⊙ for low-mass binaries with soft equations
of state. We comment on the astrophysical implications of
our findings and on the long-term evolutionary scenarios
that can be conjectured on the basis of our simulations.},
cin = {THE},
ddc = {530},
cid = {I:(DE-Ds200)THE-20051214OR028},
pnm = {612 - Cosmic Matter in the Laboratory (POF3-612)},
pid = {G:(DE-HGF)POF3-612},
typ = {PUB:(DE-HGF)29 / PUB:(DE-HGF)16},
eprint = {1611.07152},
howpublished = {arXiv:1611.07152},
archivePrefix = {arXiv},
SLACcitation = {$\%\%CITATION$ = $arXiv:1611.07152;\%\%$},
UT = {WOS:000407020400002},
doi = {10.1103/PhysRevD.96.043004},
url = {https://repository.gsi.de/record/208887},
}